Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dieu cua » dieu tra
van hanh » van thanh, ban hanh, van anh
luoc van » luoc can, luoc va, luc van
hau luoc » hau loc, khai luoc, muu luoc
nang xa » nang x, lang xa, nang ma
sach va » sach xa, sach ha, sach dao
van hau » van ha, van hai, van dau
sach v » sach y, sach 2, sach vay
de cua » le cua, te cua

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach v) OR (sach va)) nang xa hoi. hieu van hau luoc van hanh ((de cua) OR (dieu cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach v) or (sach va)) nang xa hoi. hieu van hau luoc van hanh ((de cua) OR (dieu cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: te ((sach v) or (sach va)) nang xa hoi. hieu van hau luoc van hanh ((de cua) OR (dieu cua)) triet*.